Air cooler for jacketed cylinders



May 15, 1928. 1,669,530 H. MILLER AIR CQOLER FOR JACKETED GYLINDERS Filed my e, 1927 idx Z5 iI/ f/7 Z5 Z/ ZZ Z mff1 H if Z4 75 f5 ATTORNEY Patented May 15, 1928.

UNITED@ f STATES HA'RRY MILLER, OF LITTLE NECK, NEW YORK.

A1B 'COOLER Fon JACKETED' oitrivi'iiins.

Application ineaniiy 6;' 19271 semaine'. 203,714.

My invention relates to a method and means yfor air-cooling jacketed" cylinders,- such as the j acketed cylinders of an air ycoinpressor, and more particularlyA to' means whereby -jacketed cylindersmaybe cooled by a gas, preferably air, under pressure, draw'- iug in and delivering tothe cylinder'jacket predetermined large quantities of free, atmospheric air to cool the cylinder. y

Heretofore, the use of Water circulated through the cylinderjacket to cool'th cylinder necessitated vthe continuous supply.1 ot' fresh water or the installation of cooling towers, both ofll'argel expense', vto prevent the' temperature ofthe cylinder from rising toa point where theeiliciency of the apparatus would be lowered.

By my invention the use of' water andthe large quantities of free, atmospheric air, outfside of the cylinder jacket,` which atmospheric air is also cooled; the said cooled air `being then supplied to the cylinder jacket where it may be circulated to coolvr the cylinder and then discharged. j

Another object of the invention is to provide means for cooling the compressed air and vfor cooling the free, atmospheric air, before the air reaches the jacket of the cylinder to be cooled.

Another object of the invention is toprovide means whereby the quantity of air-delivered to the cylinder jacket maybe regulated and controlled.

Another object of the invention is to provide a device through which compressed air is Supplied and free air is drawn, and delivered to a cylinder jacket, which device is of-little cost and economical in operation and which may be readily attached, removed or replaced. j Y p j With the above and other objects in View, my invention consists inthe parts, improvements and combinations more fully pointedv` out hereinafter. 4

Turning now to the drawings, ywhich illustrate one embodiment of the invention: v

Figure 1, is a diagrammatic view,show

ing the air-cooling device connected to the inlet pipe of an" airv compressor" cylinderV jacket.

FigureQj, a horizontal section of the del vice showingv thec'ompressed air feed tube: and: thejpert'orated sleeve and hollow chainbeif, throughA which free air is drawn.

Figure' 3' is a cross-sectional viewoiifliniei B--S'of -Figure 2.

the perforated disc for piel'imiharily cool-l ing' the compressed air, interposed in the compressed air supply line.

In' the embodiment of the invention 'illustrated, one application of my invention-is shown', to' wit: whenusedto supply air to the I. i jacket of the cylinder of an air compressor 'I Y j to cool the cylinder.

In the drawings, the air compressor shown` Lis of the usual type, in which air isy initially compressed and which air is later 'com'- pressed in another compressor' to gage p1-egg sure. The compressor shown'Qisn provided` withfthe usual clinder l, in which the 'p is ton 2, moves. T e cylinderl, is lprovidedatl eachentl with a head 3, and the cyli'nderc'as? ing'is surrounded by the jacket`4. Confk suppliedto cylinderl, through'pipe 7, andfp nectedk to and projecting `from the jacket` pipe, andthe outlet pipe 6,

the aii" after it has been initially compressedy y say to 30` or 40 lbs; passes from this;V cio/ifn-r 9a, tothe cylinder I, of a second compressor,- which may be similarly air-cooled. In the presser through pipej8provide`d with wa-l second compressor,the air is compressed to-n gage pressure, say lbs.,lfroin whicli'it i passes through pipe 9,.tofair receivers, sucir as air receiver 10, see Figure l, where itr is stored for use as desired.

Meansare provided for 'supplying gas, preferably compressed air,` under pressure, so as to draw 1n and supply quantitiesof free,atmospheric air, to thecyl-inder jacket,

and means are alsoy provided for cooling the compressedair and free air so supplied'.

When, as illustrated,t` th'ejinvention is applied to cool the cylinderof' an airK compres-` sor,.thecompressedair used inthe cooling operation is suppliedwfroin an airk recel-ver."

such asy receiverlO. j The receiverv l0- is filled 12, a urtherdexpansion of the air and radia with compressed air, which, as issknown,`

passes from the compressor at a high temperature tothe air'receivers, where due to trolled by valve a.

l compressed air.

expansion and heat radiation, it becomes considerablycooler. f

As shownin the drawings (seeFigurell), compressed air to be used for cooling `the cyl inder 1, is tapped from receiver 10, and con-` passes through pipe 11 to tank 12. Intank tion of heat talesplaceto further cool the l From tank 12, the compressed air passesfinto supply pipe 13.j

Means maybe provided for further cool-1. ing the compressedxair as it passes through "the supply pipe 13. As illustrated, {seeFigure 5, the supply pipe 13 may be sectioned. Between `the sections of the pipe, ay tapered,

perforated (see Figure) is interposed., ,j The periiorateddisc .141, isheld in place,` and the pipe sections joined by meansof couperforations indisc'll, the air expanding and cooling asit passes through the perforavpip@ ia i tions" and intouthe` adjoining section `of s illustrated, ,a perforated,` sleeve 17 is provided between the compressed air` supply pipe 13, and the inlet pipe 501i Athe jacket 4.

' As shownin the'fdrawings, (see Figure 2)," the sleevel 17, is provided `with aplurality" Y of rowsotopeningsas at 18, and with a plurality of slots as at 19, through which openings and slots atmospheric airgis admitted. .The sleeve 17 is screiIv-tlireadedatV 17?,"so that 'it maybe joined to the com- 'pressed airrsupplyfpipe 13. Atits d istal end the sleeve is screw-threaded o n its outside and `preferably carries 'a pair of suitably threadedcouplings 20, 21, each vofwhichis provided with rows of separated orifices at 2Q, 23, eX-

tending `around Vthe couplings; v The :coupling j i 20, is shownscrewfthreaded on itsinner side,

so as to receive the projecting endof inlet pipe `5.` Thepertorated sleeve is thus connectedat 'oneend to the compressed air sup- ""ply pipe 13, and `atits other end tothe inlet -pipe 'of "the cylinder jacket.

A `feed tube 24 is ,provided for feeding the compressedair from'pipe 13, so as to draw quantities of `tree air throughthe per- `forated sleeve and'cool and supply it to the cylinder jacket. As` shown in the drawings,` see FigureQ, the feed tube 24:, is mounted Within the sleeve 17, by means ofa bushing 25, through which bushing lthe tube passes.`

` The feed tubefis "thus so mountedwithin the perforatedsleeve 17 as to provide fa hollow1 `chamber"26, between the perforatedfsleeve The` compressed.j air rheld in position. j i Y l that the air-coplingmeans 115 A'of a smallamount of compressed air, or gas, l under pressure, to the feed tube mounted Iwithin the .perforatedsleeve, so that Athe `compressed airor gas discharging from the vents compressedair from 113, entering the hollow chamber (see Figure 2).` TheA coupling 21,`is so mounted on the sleeve 17, x

and connectedlto'inlet pipe 5, Vas to provide a second chamber 27, into which the compressed air," passing "through .feed tube 24,

from pipely, discharges. The compressed i air discharging into# chamber-V27, exhausts the air in chamber 26, and draws in large quantities of freeyat'inospheric air, through the orifices in` the `couplings andthe openand also coolslthe free, `atmospheric air,

lings and slots in the-sleeve. v 'lheprelimiQ ,v narilycooled compressed Lair discharging into` `the hollow chamber`27, expands and cools passesfrom chamber.` 27, into the inlet pipe `5, and :thence tothe cylinder jacketitV where it circulates and cools thefcylinderlbefore .u

. discharging through outlet pipe 6.

Means are provided rorregulatingfandir controlling .the amountlof `free, atmosl'iheric` air` delivered toI cool `the cylinder.

As shown in the'drawings,fsee

il l l u n l u Figures f u "and 4, anelongated, oval ring" 28 is pro-` vided, carried by the sleeve 17. `Vih'en the `ring is in its normal,` position' atv the rear of` the slots and openings in sleeve 17,",(shown` in dotted lines in KFigureQ)` the passage 4of atmospheric air through thelslots and open- `the sleeve, the 'slots in sleeve,`orthe opencontrol the supplyof `free `air,in` any man-` .ner` desired. j' `The regulating ring 28,` is Vcon- 'ingsisfrlee and uniniped'edi When, due to the "size of the cylinder,or the temperature conditions, less air is necessary,the ring may `be slid alongtlie sleeve 17,' to any .desired lposition, `where it `may, cover the openings in ico structedso as to `permit it being locked in made slightly oval', so that itmay pass along its adjusted position. The ringis preferably v i `the sleeve andwhen inthe desired*posit-ion` is slightly twisted soasto frictionally Itlwill'benoted u l above described only necessitatesthesupply Jfeed .tube v`will draw in large quantities of It will also be noted that the sleeve carrying the feed tube may be readily attached toor in anyway. The air-cooling devicefitwill `be seen, is of little cost, economical in operaj tion andmay be;readilyremovediorireplaced l as desired.

e and therese tube and ambushingespren Win as@ be obsevedxthai the size of so "drawnintothechamber throughthelsleeve 17 and the chamberQ. `The cooled come` pressed 'air and thecoole-d `atinospheric.,air f "free, atmospheric air tocool the cylinderj 1 tliefeed tube, and of the perforated sleeve, andof the openings and-slots, may be varied in accordance with the size or working con'-k sors, compressed airis usedin the coolingy operation, and this compressedl air is that produced from tli'ecylinders whichare being-cooled in accordance with my invention. The compressed air so v produced lreaches :the receivers l0, at'a very high temperature,v

Where through expansion and heatradiation itb'ecomes cooler. -A portion of this com# pressed air is tapped from receiver l0-to be used' for coolingthe compressor cylinders. I have found it possible to secure this cooling resultvwith the use of only a small amount-0fl compressedl air, which is passed through pipe 1l' fromvthe receiver 10, to a tank-'12. The compressed air passing through tank 12, becomeslurtlier cooled by expansion and heat radiation, and is again cooled, by n means of the perforated disk 11i, it passes through. supply pipeI 13, on its way to the cylinder"jacket.y Fromssupply pipe 13 the compressed `air passes into the feed tube'2a,

and out into the hollow chamber 27, pro! vided by the coupling 20, between the sleeve l7- andthe inlet pipe 5. l/Vhen the air reaches this chamber 27, it has beeiicoolcd toa temperature below that ofv the atiiiosphere. The compressed air `discharging into the chamber 27, and into the inletpipe 5,

of' the cylinder jacket, draws inquantities of i free, atmospheric air through the perforated sleeve 17, andl through the hollow chamber 2G, providedv between the sleeve and the feedtube 24E.- This tree air is cooled bythe compressed air as it passes through the chamber 27, on its way to` that of the compressed air supplied. Alarge quantity o'ffree, atmospheric 4air and a small quantity of compressed air, is thus cooled and supplied to the cylinder jacket, where it circulateswand discharges through outlet pipe 6, thus providing an efficient and eccnoinical means tor cooling the cylinder. It

' it is 'desired'to regulate the quantity of free airthat is being. supplied, this may done;

by means" of the regulating ring.E 28'; lwhich i,

may be moved'ltoi any. desired position ialong" the sleeve,and cover'the slots .ori'per'i'oiraew tions, asdesired, r this ring being.` slightly ovalso that itiiiay be lockedin'its adjusted position.l f

llaving` thusdescribed the invention: and: operation,V it'4 will: be" understood that? changes ymay beI made in carrying the iiiven'w tion rinto eljlfectf anfd th'at it' inlays-be applied to the jacketed cylinders oi'Y various-inauchines, such as` the cylinders ofaA gas engine orf the like. 1

lVhat l claim is: y i

l. An air cooler for jacketed cylinders comprising' iiiicombination with a cylinderiy and its jacket, nieans-for supplyingfw gasr` under -pressure,1means through which sa-idi` gas under pressurey draws-in"v quantities offree air, means for delivering the free air to` the cylinderijacket, and ii'ieansfori` dischargi ing the air, after it has circulated throug'hl the jacket to Lcool the cylinder;

2; An air cooler lor jacketed cylindersp comprising in combination witha-cylinder and its jacket, meansl toi-'supplying -a gas under pressure, means throughy whichA said gas under pressure 1 draws@ inquantities-of free air, means forf delivering tliefair 'to the cylinder jacket, meansJ lor7 regulating thleL quantity oitfairdelivered, andmeansfor discharging the air, after it hasl circulated through thek acket tocool `the icyliiiiderl.`

- `lqnlvarjcooler^ for jacket'ed' cylindifers#v j comprising-1n combination lwith* a cylinder`l and its jaclret`,-means orsupplying com, pressed air, means I through which said com-v pressed airfdraws' in quantitiesoflf'ree, at,Y inospheric air, inlet meansconnectedtothe 'compressed air and-atmospheric airsupply means, through which the-air passes to the cylinderv jacket and outlet means connected"` to the cylinder' jacket for dischargingthe air, after: it has circulated-to cool the cylinder.

4f. An air cooler for jacketedcylinders comprising in combination withVa cylinder andA its jacket, meansfor` supplying compressed air, meansthrough-whichsaid compressed" air` draws in quantities offree air,` means for cooling the compressed air and` for cooling the free air, an inlet pipe con'-` nected'to and projectingk from said'cylin'der jacket, means for supplyingv the compressed air and reeair to said inletpipe and the cylinder jacket, and an outletipipe connect'- ed to thecylindei' acket through which' the air is discharged, after it' has circulated to coolfthe cylinder.

5. Ain air cooler for jacketedcylinders of air' compressors, comprising in combination with an. aiif'compressor cylinder and its jacket, an inlet pipe A`connected to and pro@ jecting from the cylinder jacket, a Jfeed tube arranged to register with said inlet pipe, Y.

`of air compressorscomprising in combinameans for supplying cooled compressedair from the ,airpcompressorto sai'dvfeed tube,

means through which saidcompressed air,`

dischargingvfromsaid feed tube, draws in and cools quantities .of `free air, the, compressed air and free air passing through the inlet pipe to the compressorfcylinder jacket,

\ and an outlet pipe connected to the compressor cylinder jacket, through which the;

air discharges, after it has `circulated to `cool the compressor cylinder. i v i 6. Anvair cooler forjacketedcylindersof air compressors, comprising `in combination with anair compressor cylinder and its jacket, a perforated sleeve, connections between said sleeve and the cylinder jacket, a

feed tube arranged within saidsleeve, vso as` to provide a hollow chamber between the feed tube and the sleeve, means for supplyingfcooled compressed air to` said ,i feed tube so as toljdraw 1 in quantities of free air through 'the perforated sleeve and hollow chamber and coolit before delivery tothe cylinder jacket, and means for discharging the air j jacket to cool the cylinder.`

,t after ithas circulated throughthe` 7 An air cooler for jacketed cylinders of air compressors, comprising in combination `with an `air compressor cylinder and its jacket, ajperforatedsleeve a feedtube arranged withinsaid sleeve, so as to provide a hollow chamber between the feed tube and the sleeve, an `inlet pipe connected to the `compressor cylinder jacket, means for connecting4 theiperforated sleeve to the inlet pipe so asto provide achamber between the;

i sleeve and the inlet pipe, means'for supply- `ing compresed air, from the air compressor,

to the feed tube, solas to draw quantities of free air. through 'the perforated sleeve, `the said compressed air expanding and cooling as` it discharges intoi the chamber between the sleeve and inlet pipe, thus cooling the free air as it `passes to the inlet pipe, and

means for discharging the air, after it has circulated to cool the cylinder.

8. An air cooler Yfor jacketed cylinders of air compressors, comprising in combination, witha compression cylinder andits jacket, a perforated sleeve, connections between the sleeve and the cylinder jacket, a feed tube arranged within said sleeve, so as to provide a hollow chamber betweenthe feed tube and sleeve, means for ,supplying cooled compressed air from the air compressor tosaid feed tube so as to draw in quantities of free air through said sleeve and hollow` chamber, means forcooling the free airand delivering it to the compressor cylinder jacket, a `regulating ring adapted to be moved overthe perforated sleeve to regulate the quantity of free air delivered,and;means for discharging the air, after it has circulated through the jacket to cool the cylinder.A

\ vthrough the perforate 9. An air `cooler 4for jacketed cylinders t tion with` a1 compressor cylinder andits jacket, aperforated sleeve, connections be`` g tween said sleeve andjacket, said connections forming ya `chamber between the sleeve and jacket, a feed tubearranged` ,withinsaid 1,

sleeve so as toprovide a chamberv between tube so `as to draw quantitiesfof free-air through the `perforated, p sleeve, the compressed air discharging into thechamber between the sleeve and the jacket, where it i expands and cools the free air, before the` air is delivered to the compressor'cylinder,;

an` elongated,` oval ring for regulating the quantity of free ,airdehverech said ringbeing `constructed to be moved along the per.- V

forated sleeve and to be self-locking in its `'adjusted position, and means for discharging` the air, after it has circulated `through thejacket to cool the cylinder.

l0. `An air cooler for jacketed cylinders for air compressors, comprising in clnnbina` tion with the compressor cylinder and its jacket, a pipe for supplying compressed air,

ineansfor cooling the compressed air so Supa plied, a perforated sleeveconnected to the w supply pipe, said sleeve being provided at its rear end with a bushing, a feedtube mounted in said sleeveand passing 4through said bushing, said feed tuberegisteringwith t the compressed air supply pipe,1`a coupling `carried by the forward end ofsaid sleeve, so

as to couple the sleeve to the inlet` pipe of, the cylinder jacket to provide a hollow cham- Y ber betweenthe sleeve and inlet pipe, the

said coupling being providedwith orifices, the compressed air passing from tlieifeed tube so as to draw in sleeve and the` oriiices in the coupling and cooling the free air in the chamber between the sleeve and inlet pipe before the vair circulates through the cylinder jacket to cool the cylinder.

ll. An air cooler for jacketed cylinders.

`uantities of free air of air compressors comprising in combina-v tion with the compressor `cylinder and its-- jacket, means for supply compressed air inder, said means including aiiairv receiver, f

fa pipe line leading from` said receiver to the t compressor cylinder, a cooling tank for the v compressed air, interposed in` said pipeline, a perforated sleeve connected to said pipe line, a feed tube mounted within said sleeve,

projecting from the vcompressor. cylinder jacket, a coupling 'carried by theperforated sleeve for coupling the sleeveto the inlet t pipe, so as to provide a hollow chamber bef yl @tween the sleeve andthe inlet pipe, the cor`n- V fromthe compressor tothe compressor cyl-l i pressed air discharging from the feed tube nected to the Cylinderjaeket, for discharging and drawing in quantities of free air the air, after it has circulated to cool the through the perforated sleeve, the comeylinder. 10 pressed air Cooling and cooling the free air In testimony whereof, I have signed my 5 inthe hollow chamber between the sleeve naine to this specification.

and the inlet pipe before the air passes into the cylinder jacket, and an outlet pipe con- HARRY MILLER. 

